So, take the MB out of the box and make sure that both power cables are connected. Then, make sure the CPU fan is connected. Then, put one stick of ram in the first slot. Then, make sure the 6 pin or both 4 pin supplementary power cables are plugged in to your GPU. Then try booting into the BIOS without HDD or anything else attached. If no joy, try a different stick of ram in the first slot and repeat.